I'll bet serious money the shop isn't paying a penny for this. They got sold on "cool, high-tech" display doors "at no cost to you". Or even, "WE'LL pay YOU to

I'll bet serious money the shop isn't paying a penny for this. They got sold on "cool, high-tech" display doors "at no cost to you". Or even, "WE'LL pay YOU to install these" (which would be some ad revenue split deal) The ads pay for these.